Struct mz_catalog::durable::StateUpdate

pub struct StateUpdate<T: IntoStateUpdateKindJson = StateUpdateKind> {
    pub kind: T,
    pub ts: Timestamp,
    pub diff: Diff,
}

A single update to the catalog state.

Fields

kind: T

They kind and contents of the state update.

ts: Timestamp

The timestamp at which the update occurred.

diff: Diff

Record count difference for the update.

Implementations

impl StateUpdate

pub(crate) fn from_txn_batch_ts( txn_batch: TransactionBatch, ts: Timestamp, ) -> impl Iterator<Item = StateUpdate>

Convert a TransactionBatch to a list of StateUpdates at timestamp ts.

pub(crate) fn from_txn_batch( txn_batch: TransactionBatch, ) -> impl Iterator<Item = (StateUpdateKind, Diff)>

Convert a TransactionBatch to a list of StateUpdates and Diffs.

Trait Implementations

impl<T: Clone + IntoStateUpdateKindJson> Clone for StateUpdate<T>

fn clone(&self) -> StateUpdate<T>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<T: Debug + IntoStateUpdateKindJson> Debug for StateUpdate<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl From<((Result<SourceData, String>, Result<(), String>), Timestamp, i64)> for StateUpdate<StateUpdateKindJson>

Decodes a StateUpdate<StateUpdateKindJson> from the (key, value, ts, diff) tuple/update we store in persist.

fn from( kvtd: ((Result<SourceData, String>, Result<(), String>), Timestamp, i64), ) -> Self

Converts to this type from the input type.

impl<T: Ord + IntoStateUpdateKindJson> Ord for StateUpdate<T>

fn cmp(&self, other: &StateUpdate<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized + PartialOrd,

Restrict a value to a certain interval.

impl<T: PartialEq + IntoStateUpdateKindJson> PartialEq for StateUpdate<T>

fn eq(&self, other: &StateUpdate<T>) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl<T: PartialOrd + IntoStateUpdateKindJson> PartialOrd for StateUpdate<T>

fn partial_cmp(&self, other: &StateUpdate<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl TryFrom<&StateUpdate> for Option<StateUpdate>

type Error = DurableCatalogError

The type returned in the event of a conversion error.

fn try_from(_: &StateUpdate<StateUpdateKind>) -> Result<Self, Self::Error>

Performs the conversion.

impl TryFrom<StateUpdate<StateUpdateKindJson>> for StateUpdate<StateUpdateKind>

type Error = String

The type returned in the event of a conversion error.

fn try_from( update: StateUpdate<StateUpdateKindJson>, ) -> Result<Self, Self::Error>

Performs the conversion.

impl<T: Eq + IntoStateUpdateKindJson> Eq for StateUpdate<T>

impl<T: IntoStateUpdateKindJson> StructuralPartialEq for StateUpdate<T>